The two previous photos on the listed site, p01668 and p01669, show what looks like a normal junction between roof, end and sides on the same car.

Greg Kennelly
Burnaby, BC

--- Schuyler Larrabee wrote:

Actually, it looks sort of like the corners of the ends and sides are
flanged, like the sides are long enough to run past the plane of the end,
much like the roof does. Is that correct? You can't see the far corner
because of the ladder's stile.

SGL